Question

18. The distance between the mirror's surface and focal point is called the
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Answer 1

Answer:

The distance from the mirror to the focal point is known as the focal length (represented by f). Since the focal point is the midpoint of the line segment adjoining the vertex and the center of curvature, the focal length would be one-half the radius of curvature.

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Answer 2

Answer:

Focal length

Explanation:

Focan length is the distance between position of mirror to focal point.